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Finding the Fourth Proportional to 13,321.87, 19,963.73 and 9,784.13

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Solution

The fourth proportional to 13,321.87, 19,963.73 and 9,784.13 is: 14,662.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,321.87 : 19,963.73 = 9,784.13 : x
  2. Step 2: Convert to fraction form
    13,321.87/19,963.73 = 9,784.13/x
  3. Step 3: Cross multiply
    13,321.87x = 19,963.73 × 9,784.13
  4. Step 4: Simplify right side
    13,321.87x = 195,327,654.25
  5. Step 5: Solve for x
    x = 195,327,654.25/13,321.87
  6. Step 6: Final answer
    x = 14,662.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.